Comparison of the Efficiency of Hyperspectral and Pulse Amplitude Modulation Imaging Methods in Pre-Symptomatic Virus Detection in Tobacco Plants

Overview

Journal Plants (Basel)

Date 2023 Nov 25

PMID 38005728

Authors

Alyona Grishina

Oksana Sherstneva

Anna Zhavoronkova

Maria Ageyeva

Tatiana Zdobnova

Maxim Lysov

Anna Brilkina

Vladimir Vodeneev

Affiliations

Soon will be listed here.

Abstract

Early detection of pathogens can significantly reduce yield losses and improve the quality of agricultural products. This study compares the efficiency of hyperspectral (HS) imaging and pulse amplitude modulation (PAM) fluorometry to detect pathogens in plants. Reflectance spectra, normalized indices, and fluorescence parameters were studied in healthy and infected areas of leaves. Potato virus X with GFP fluorescent protein was used to assess the spread of infection throughout the plant. The study found that infection increased the reflectance of leaves in certain wavelength ranges. Analysis of the normalized reflectance indices (NRIs) revealed indices that were sensitive and insensitive to infection. NRI was optimal for virus detection; significant differences were detected on the 4th day after the virus arrived in the leaf. Maximum (F/F) and effective quantum yields of photosystem II () and non-photochemical fluorescence quenching (NPQ) were almost unchanged at the early stage of infection. and NPQ in the transition state (a short time after actinic light was switched on) showed high sensitivity to infection. The higher sensitivity of PAM compared to HS imaging may be due to the possibility of assessing the physiological changes earlier than changes in leaf structure.

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